Portable activity monitor



FIG. 1 is a perspective view of a portable activity monitor coupled to an anchoring device, according to one embodiment of the present design;

FIG. 2 is a perspective view of a portable activity monitor in a latched mode, according to one embodiment of the present design;

FIG. 3 is a front view of the portable activity monitor in an unlatched mode, according to one embodiment of the present design;

FIG. 4 is a rear view of the portable activity monitor in the unlatched mode, as shown in FIG. 3; and,

FIG. 5 is a side view of the portable activity monitor in the unlatched mode, as shown in FIG. 3.

The broken line showing a portion of an anchoring device and/or a tag is for the purpose of illustrating environmental structure and forms no part of the claimed design. 

CLAIM The ornamental design for a portable activity monitor, as shown and described. 